Area | Mathematical problems | Geometric dissection | History of geometry | Euclidean plane geometry
In geometry, a square trisection is a type of dissection problem which consists of cutting a square into pieces that can be rearranged to form three identical squares. (Wikipedia).
Trigonometry 4 The Area of a Triangle
Various ways of using trigonometry to determine the area of a triangle.
From playlist Trigonometry
What is a perfect square trinomial
http://www.freemathvideos.com In this video playlist I show you how to solve different math problems for Algebra, Geometry, Algebra 2 and Pre-Calculus. The video will provide you with math help using step by step instruction. Math help tutorials is just what you need for completing your
From playlist Factor Quadratic Expressions
Trigonometry for Beginners || Trigonometry Basics
Trigonometry is a branch of mathematics that studies relationships between side lengths and angles of triangles. This math video tutorial provides a basic introduction into #trigonometry. It covers trigonometric functions, ratios such as sine, cosine, and tangent, converting polar coordin
From playlist Trigonometry
Using a set of points determine if the figure is a parallelogram using the midpoint formula
👉 Learn how to determine the figure given four points. A quadrilateral is a polygon with four sides. Some of the types of quadrilaterals are: parallelogram, square, rectangle, rhombus, kite, trapezoid, etc. Each of the types of quadrilateral has its properties. Given four points that repr
From playlist Quadrilaterals on a Coordinate Plane
Trigonometry - Vocabulary of trigonometric functions
In this video will cover some of the basic vocabulary that you'll hear when working with trigonometric functions. Specifically we'll cover what is trigonometry, angles, and defining the trigonometric functions as ratios of sides. You'll hear these terms again as we dig deeper into the st
From playlist Trigonometry
Images in Math - Polygon Triangulations
This video is about triangulations of polygons.
From playlist Images in Math
3 Squares Problem: Trigonometric Identity (Proof Without Words)
Link: https://www.geogebra.org/m/w8r7rn9Q
From playlist Trigonometry: Dynamic Interactives!
Twelve Ways to Trisect an Angle – David Richeson
We all know that it is impossible to trisect an angle, right? It is impossible using only a compass and straightedge. But it is possible if we change the rules. For G4G12 we present a dozen ways to trisect an angle.
From playlist G4G12 Videos
How to Trisect an Angle with Origami - Numberphile
Zsuzsanna Dancso trisects an angle using origami - follows on from this video about Euclidean geometry: http://youtu.be/6Lm9EHhbJAY More links & stuff in full description below ↓↓↓ Special thanks to the Patreon supporters listed below: Herschal Sanders (from Susan) Lê OK Merli Alex Bozzi
From playlist Zsuzsanna Dancso on Numberphile
Visual Group Theory, Lecture 6.8: Impossibility proofs
Visual Group Theory, Lecture 6.8: Impossibility proofs The ancient Greeks sought basic ruler and compass constructions such as (1) squaring the circle, (2) doubling the cube, and (3) trisecting an angle. In the previous lecture, we learned how a length or angle 'z' is constructable iff th
From playlist Visual Group Theory
Euclid's Big Problem - Numberphile
Trisecting angles and calculating cube roots was a big problem for Euclid and his cohorts. Discussed by Zsuzsanna Dancso at MSRI. More links & stuff in full description below ↓↓↓ TRISECT WITH ORIGAMI: http://youtu.be/SL2lYcggGpc CIRCLE THE SQUARE: http://youtu.be/CMP9a2J4Bqw Support us on
From playlist Zsuzsanna Dancso on Numberphile
8ECM Invited Lecture: Burak Özbağcı
From playlist 8ECM Invited Lectures
2000 years unsolved: Why is doubling cubes and squaring circles impossible?
Today's video is about the resolution of four problems that remained open for over 2000 years from when they were first puzzled over in ancient Greece: Is it possible, just using an ideal mathematical ruler and an ideal mathematical compass, to double cubes, trisect angles, construct regul
From playlist Recent videos
Sierpinski's Triangle, Koch Snowflake and Pythagorean Tree
From playlist Exploring Mathematics: Fractals
David Gay: Trisections diagrams and surgery operations on embedded surfaces​
Abstract: Various surgery operations on dimension four begin with a 4-manifold X and an embedded surface S, then remove a neighborhood of S and replace it with something else to produce an interesting new 4-manifold. In a few standard surgery constructions, especially the Gluck twist opera
From playlist Topology
30-60-90 triangle example problem | Right triangles and trigonometry | Geometry | Khan Academy
Using what we know about 30-60-90 triangles to solve what at first seems to be a challenging problem Practice this lesson yourself on KhanAcademy.org right now: https://www.khanacademy.org/math/geometry/right_triangles_topic/special_right_triangles/e/pythagorean_theorem_2?utm_source=YT&u
From playlist High School Geometry | High School Math | Khan Academy
What are the names of different types of polygons based on the number of sides
👉 Learn about polygons and how to classify them. A polygon is a plane shape bounded by a finite chain of straight lines. A polygon can be concave or convex and it can also be regular or irregular. A concave polygon is a polygon in which at least one of its interior angles is greater than 1
From playlist Classify Polygons
How to determine the perimeter of a quadrilateral using distance formula of four points
👉 Learn how to determine the figure given four points. A quadrilateral is a polygon with four sides. Some of the types of quadrilaterals are: parallelogram, square, rectangle, rhombus, kite, trapezoid, etc. Each of the types of quadrilateral has its properties. Given four points that repr
From playlist Quadrilaterals on a Coordinate Plane
👉 Learn about polygons and how to classify them. A polygon is a plane shape bounded by a finite chain of straight lines. A polygon can be concave or convex and it can also be regular or irregular. A concave polygon is a polygon in which at least one of its interior angles is greater than 1
From playlist Classify Polygons
Burkard Polster - Animating Conway - CoM Oct 2021
The plan is to show you very pretty animated proofs of two or three of John Conway’s ingenious theorems. The proof of the Conway Circle result discussed from 13:13 to 21:30 is by Paul Farrell of Technological University Dublin, see his YouTube video at Math Moves: https://www.youtube.com
From playlist Celebration of Mind 2021